From: Henry Jones <mathieu.houle@...>
Date: 2008-02-08T07:26:20+09:00
Subject: BigDecimal.new('15.25') == 15.25, false ??

Hi,

I was writing some unit tests when I ran into some troubles.. In the end
I found out the problem :

BigDecimal.new('15.25') == 15.25

returns false !!

BigDecimal.new('15.25').to_f == 15.25.to_f also returns false.

Substracting both values returns 1.7763... e-015

This is on ruby 1.8.6, Win32.

I'm a comp. engineer, so I know it's ultimately related to the binary
value of 15.25 which cannot be precisely represented (without an
infinite number of bits) , but I'm still amazed that such a simple
comparison with a literal value should fail...
-- 
Posted via http://www.ruby-forum.com/.